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Memory Management in Java: An Introduction

Understanding memory management in Java, and particularly the role of object allocation is essential when optimising system performance.
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- Latest
- Java Core
- Performance
- Jasmine Taylor
Sep 27, 2023
Down the Rabbit Hole of an Apache APISIX Plugin

Let’s check the parameters of the _M.access(conf, ctx) function in an Apache APISIX plugin, especially the ctx one.
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- Latest
- DevOps
- Nicolas Frankel
Sep 27, 2023
How Software Companies Give Away Stuff for Free

There are many different ways to give away stuff for free and in this article I try and explain the main approaches that software companies use and the reasoning behind these methods.
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- Latest
- Developer Tools
- Tools
- Jamie Coleman
Sep 26, 2023
Visit Azul at Devoxx

As a sponsor of the largest Java developer community conference in Europe, the Azul team is excited to be back and looking forward to meeting with you in person!
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- Latest
- Books
- Events
- Simon Ritter
Sep 26, 2023
Foojay Podcast #29: How will AI and ML Influence the Role of Developers?

Every conference has several talks about these technologies, and on Foojay, you can find multiple posts about it. Let’s take a look at it from the Java point of view.
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- Latest
- Deep Netts
- Machine Learning
- Podcast
- Project Panama
- Frank Delporte
Sep 25, 2023

What's New?

OpenJDK Migration Guide for Dummies

If you have a variety of specialized Java applications, created at different times and running on different JDK versions, you may have some anxiety about making the switch to OpenJDK. But, worry no more, Java Champion Simon Ritter has you covered in a new (free) book.

Download For Free

OpenJDK 21 LTS Released!

On September 19, 2023, the latest Long Term Support (LTS) release, OpenJDK 21 LTS was released. Get started...

Foojay — a place for friends of OpenJDK

Foojay is the central resource for the OpenJDK community’s daily information needs, the community platform for the OpenJDK ecosystem that brings together and helps developers everywhere.

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"Foojay.io is building up quite the library of articles! With commitment and input from some of the best companies in the industry."

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"If you are overwhelmed by Java updates and have no time to catch up, I highly recommend trying Foojay.io!"

Neha Sardana @nehasardana09
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"Do you want to find any information related to OpenJDK and Java? Then visit Foojay.io!"

Elias Nogueira @eliasnogueira
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"Wow, Foojay.io is a fantastic place for OpenJDK and Java in general, new features, explanations, and great content posted every day, try it!"

Mohamed Taman @_tamanm
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"Just visited Foojay.io and instantly followed it on Twitter: it is an excellent resource for the OpenJDK community."

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"We are glad that Foojay exists: a community of Java professionals for daily analysis, curated highlights, and categorised Java reference materials."

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OpenJDK Release Roadmap

OpenJDK 21 (LTS)

This release is the Reference Implementation of version 21 of the Java Platform, as specified by JSR 396 in the Java Community Process.

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Sep 19, 2023
OpenJDK 20

This release is the Reference Implementation of version 20 of the Java Platform, as specified by JSR 395 in the Java Community Process.

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Mar 21, 2023
OpenJDK 19

This release is the Reference Implementation of version 19 of the Java Platform, as specified by JSR 394 in the Java Community Process.

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Sep 20, 2022
OpenJDK 18

This release is the Reference Implementation of version 18 of the Java Platform, as specified by JSR 393 in the Java Community Process.

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Mar 22, 2022
OpenJDK 17 (LTS)

This release is the Reference Implementation of version 17 of the Java SE Platform, as specified by JSR 392 in the Java Community Process.

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Sep 14, 2021
OpenJDK 16

Provided Warnings for Value-Based Classes, Pattern Matching for instanceof, Records (see more on Foojay), and Sealed Classes, as a preview feature (see more on Foojay).

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Mar 16, 2021
OpenJDK 15

OpenJDK 15 is the open-source reference implementation of version 15 of the Java SE Platform, as specified by by JSR 390 in the Java Community Process.

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Sep 15, 2020
OpenJDK 14

Provided a significant set of new features—the addition of Records (as a preview feature), pattern matching for instanceof (also as a preview feature), and more helpful NullPointerExceptions.

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Mar 17, 2020
OpenJDK 13

Introduced Text Blocks, as a preview feature, and the second preview of Switch Expressions.

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Sep 17, 2019
OpenJDK 12

Introduced OpenJDK preview features, which are fully specified and implemented, but impermanent, available in an OpenJDK feature release for feedback, which may lead to it becoming permanent, with Switch expressions as the first preview feature.

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Mar 19, 2019
OpenJDK 11 (LTS)

Focused more on removal than addition—we bid farewell to all of the APIs under the java.se.ee aggregator module (CORBA, JAX-B and JAX-WS) and the Oracle JDK lost the browser plugin (surely, the end of applets), Java Web Start and JavaFX.

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Sep 25, 2018
OpenJDK 10

Brought local variable type inference, with "var" introduced to the Java language, in the first release under the new six-month release cadence.

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Mar 20, 2018
OpenJDK 9

Introduced Project Jigsaw, the Java Platform Module System. A contentious development which involved delays to the release of OpenJDK 9 after the JCP took the unprecedented step of voting against the public review of JSR 376., leading to changes to the encapsulation of internal APIs and a reconsideration ballot.

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Sep 21, 2017
OpenJDK 8 (LTS)

Contained probably the biggest changes to Java since its introduction in the form of Lambda expressions and the Streams API, which add functional-style programming. This has proved to be a hugely popular feature and got many developers excited about using Java again.

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Mar 18, 2014

EVENTS

Do you have Java, Kotlin, and other OpenJDK events, meetups, and conferences to share?

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MARCH 2023

Elastic Community Conference

Virtual & Free

Apr 11, 2023

We're only two weeks into January, and we have already received 100 presentation submissions for ElasticCC — more than 20 in APJ (Asia-Pacific/Japan) and almost 40 in both EMEA (Europe/Middle East/Africa) and NASA (North/South America). That's an amazing start, and we still have room for some more. Since we know how hard it is ...

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